
The City of Jackson has approximately 1,500 fire hydrants that are supplied and maintained by the Jackson Water Department. The Water Department is responsible for flushing water from the hydrants twice annually to keep rust from building up within the water mains.
This is important; the system that provides water to the hydrants is the same system that provides the city with its drinking water. In autumn, the Fire Department checks the hydrant barrels and pumps out any standing water so it doesn’t freeze during the winter months.

The National Fire Protection Association, Section 291 governs how fire hydrants are tested and color coded for the rated flow of water. The hydrant caps are painted one of four colors indicating the rated flow capacity of that individual hydrant.
The color coding and rated capacity of the hydrants are: